101 lines
3.7 KiB
C++
101 lines
3.7 KiB
C++
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#if !defined(BOOST_PP_IS_ITERATING)
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// Copyright David Abrahams 2002.
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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# ifndef INVOKE_DWA20021122_HPP
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# define INVOKE_DWA20021122_HPP
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# include <boost/python/detail/prefix.hpp>
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# include <boost/python/detail/preprocessor.hpp>
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# include <boost/python/detail/none.hpp>
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# include <boost/type_traits/is_member_function_pointer.hpp>
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# include <boost/preprocessor/iterate.hpp>
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# include <boost/preprocessor/facilities/intercept.hpp>
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# include <boost/preprocessor/repetition/enum_trailing_params.hpp>
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# include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp>
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# include <boost/preprocessor/repetition/enum_binary_params.hpp>
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# include <boost/python/to_python_value.hpp>
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// This file declares a series of overloaded invoke(...) functions,
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// used to invoke wrapped C++ function (object)s from Python. Each one
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// accepts:
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//
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// - a tag which identifies the invocation syntax (e.g. member
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// functions must be invoked with a different syntax from regular
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// functions)
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//
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// - a pointer to a result converter type, used solely as a way of
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// transmitting the type of the result converter to the function (or
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// an int, if the return type is void).
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//
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// - the "function", which may be a function object, a function or
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// member function pointer, or a defaulted_virtual_fn.
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//
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// - The arg_from_python converters for each of the arguments to be
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// passed to the function being invoked.
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namespace boost { namespace python { namespace detail {
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// This "result converter" is really just used as a dispatch tag to
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// invoke(...), selecting the appropriate implementation
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typedef int void_result_to_python;
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template <bool void_return, bool member>
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struct invoke_tag_ {};
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// A metafunction returning the appropriate tag type for invoking an
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// object of type F with return type R.
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template <class R, class F>
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struct invoke_tag
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: invoke_tag_<
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is_same<R,void>::value
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, is_member_function_pointer<F>::value
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>
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{
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};
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# define BOOST_PP_ITERATION_PARAMS_1 \
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(3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/invoke.hpp>))
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# include BOOST_PP_ITERATE()
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}}} // namespace boost::python::detail
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# endif // INVOKE_DWA20021122_HPP
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#else
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# define N BOOST_PP_ITERATION()
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template <class RC, class F BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
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inline PyObject* invoke(invoke_tag_<false,false>, RC const& rc, F& f BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
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{
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return rc(f( BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT) ));
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}
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template <class RC, class F BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
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inline PyObject* invoke(invoke_tag_<true,false>, RC const&, F& f BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
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{
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f( BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT) );
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return none();
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}
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template <class RC, class F, class TC BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
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inline PyObject* invoke(invoke_tag_<false,true>, RC const& rc, F& f, TC& tc BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
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{
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return rc( (tc().*f)(BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT)) );
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}
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template <class RC, class F, class TC BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
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inline PyObject* invoke(invoke_tag_<true,true>, RC const&, F& f, TC& tc BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
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{
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(tc().*f)(BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT));
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return none();
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}
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# undef N
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#endif // BOOST_PP_IS_ITERATING
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